Watts per Gallon

[67chevelle]

Is this now the inch per gallon rule of fish? I'm hearing it is "outdated and inaccurate" It's because of LED's and PAR rating. I get that when it comes to LED's. But if you are using florescent bulbs, it would still seem to be a valid tool to use to get started. Am I wrong about this?

 

[discuspaul]

IMO, on a large scale, it still has some validity.

 

[FreshyFresh]

I'd still use it as a basic guideline for fluorescent lighting. It's only part of the puzzle though..